How to get a diagram for installing a drive belt for sears craftsman 917.251560 garden tractor?

Hi,
Couple of pictures for you! This is an older garden tractor. 50" deck no longer made. To get the manual, try OwnerIQ: Product user manuals, help, forums tips and tutorials. and choose Lawn & Garden, then Poulan, then Lawn Mower and finally PRGT22H50D by scrolling well down. Will be close, but not exact.
Peace,
Clarke